import md5 from 'md5'
// 签名密钥串(前后端要一致，正式发布请自行修改)
const signatureSecret = 'dd05f1c54d63749eda95f9fa6d49v442a'

export default class signMd5Utils {
  /**
   * json参数升序
   * @param jsonObj 发送参数
   */

  static sortAsc(jsonObj) {
    const arr = []
    let num = 0
    for (const i in jsonObj) {
      arr[num] = i
      num++
    }
    const sortArr = arr.sort()
    const sortObj = {}
    for (const i in sortArr) {
      sortObj[sortArr[i]] = jsonObj[sortArr[i]]
    }
    return sortObj
  }

  /**
   * @param url 请求的url,应该包含请求参数(url的?后面的参数)
   * @param requestParams 请求参数(POST的JSON参数)
   * @returns {string} 获取签名
   */
  static getSign(url, requestParams) {
    const urlParams = this.parseQueryString(url)
    const jsonObj = this.mergeObject(urlParams, requestParams)
    // console.log("sign jsonObj: ",jsonObj)
    const requestBody = this.sortAsc(jsonObj)
    console.log('sign requestBody: ', requestBody)
    return md5(JSON.stringify(requestBody) + signatureSecret).toUpperCase()
  }

  /**
   * @param url 请求的url
   * @returns {{}} 将url中请求参数组装成json对象(url的?后面的参数)
   */
  static parseQueryString(url) {
    const urlReg = /^[^\?]+\?([\w\W]+)$/
    const paramReg = /([^&=]+)=([\w\W]*?)(&|$|#)/g
    const urlArray = urlReg.exec(url)
    const result = {}

    // 获取URL上最后带逗号的参数变量 sys/dict/getDictItems/sys_user,realname,username
    // 【这边条件没有encode】带条件参数例子：/sys/dict/getDictItems/sys_user,realname,id,username!='admin'%20order%20by%20create_time
    let lastpathVariable = url.substring(url.lastIndexOf('/') + 1)
    if (lastpathVariable.includes(',')) {
      if (lastpathVariable.includes('?')) {
        lastpathVariable = lastpathVariable.substring(0, lastpathVariable.indexOf('?'))
      }
      // 解决Sign 签名校验失败 #2728
      result['x-path-variable'] = decodeURIComponent(lastpathVariable)
    }
    if (urlArray && urlArray[1]) {
      const paramString = urlArray[1]; let paramResult
      while ((paramResult = paramReg.exec(paramString)) != null) {
        // 数字值转为string类型，前后端加密规则保持一致
        if (this.myIsNaN(paramResult[2])) {
          paramResult[2] = paramResult[2].toString()
        }
        result[paramResult[1]] = paramResult[2]
      }
    }
    return result
  }

  /**
   * @returns {*} 将两个对象合并成一个
   */
  static mergeObject(objectOne, objectTwo) {
    if (objectTwo && Object.keys(objectTwo).length > 0) {
      for (const key in objectTwo) {
        if (objectTwo.hasOwnProperty.call(key) === true) {
          // 数字值转为string类型，前后端加密规则保持一致
          if (this.myIsNaN(objectTwo[key])) {
            objectTwo[key] = objectTwo[key].toString()
          }
          objectOne[key] = objectTwo[key]
        }
      }
    }
    return objectOne
  }

  static urlEncode(param, key, encode) {
    if (param == null) return ''
    let paramStr = ''
    const t = typeof (param)
    if (t === 'string' || t === 'number' || t === 'boolean') {
      paramStr += '&' + key + '=' + ((encode == null || encode) ? encodeURIComponent(param) : param)
    } else {
      for (const i in param) {
        const k = key == null ? i : key + (param instanceof Array ? '[' + i + ']' : '.' + i)
        paramStr += this.urlEncode(param[i], k, encode)
      }
    }
    return paramStr
  }

  static getDateTimeToString() {
    const date_ = new Date()
    const year = date_.getFullYear()
    let month = date_.getMonth() + 1
    let day = date_.getDate()
    if (month < 10) month = '0' + month
    if (day < 10) day = '0' + day
    let hours = date_.getHours()
    let mins = date_.getMinutes()
    let secs = date_.getSeconds()
    const msecs = date_.getMilliseconds()
    if (hours < 10) hours = '0' + hours
    if (mins < 10) mins = '0' + mins
    if (secs < 10) secs = '0' + secs
    if (msecs < 10) secs = '0' + msecs
    return year + '' + month + '' + day + '' + hours + '' + mins + '' + secs
  }
  // true:数值型的，false：非数值型
  static myIsNaN(value) {
    return typeof value === 'number' && !isNaN(value)
  }
}
